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In what areas of daily life are silicone-based defoamers used?
Release Date:
2021-01-15
Silicone defoamers are prepared by mechanically emulsifying silicone oil, emulsifiers, water-repellent agents, thickeners, and an appropriate amount of water. They are characterized by low surface tension, high surface activity, strong defoaming performance, minimal dosage requirements, and low cost. They are immiscible with water and most organic substances, effectively eliminating foam in a wide range of foaming media. These defoamers exhibit excellent thermal stability, making them suitable for use across a broad temperature range of 5°C to 150°C. They also demonstrate good chemical stability, resisting reactions with other substances; when properly formulated, they can be used in acidic, alkaline, and saline solutions without compromising product quality. Furthermore, they possess physiological inertness, with an LD50 of 250 g/kg in rats, and are commonly employed in the food and pharmaceutical industries.
Silicone defoamer It is produced by mechanically emulsifying silicone oil, emulsifiers, water-repellent agents, thickeners, and other ingredients with an appropriate amount of water. Its key characteristics include low surface tension, high surface activity, strong defoaming performance, minimal dosage requirements, and low cost. It is immiscible with water and most organic substances, effectively suppressing foam in a wide range of gaseous media. It exhibits excellent thermal stability, making it suitable for use across a broad temperature range of 5°C to 150°C; it also demonstrates good chemical stability, resisting reactions with other substances, and—when properly formulated—can be employed in acidic, alkaline, or saline solutions without compromising product quality. Furthermore, it is physiologically inert (LD50 > 250 g/kg in rats) and is commonly used in the food and pharmaceutical industries. With both antifoaming and defoaming capabilities, it falls into the category of broad‑spectrum defoamers. It is widely applied for foam control in processes such as detergents, papermaking, pulp production, sugar refining, electroplating, fertilizer manufacturing, auxiliary agent formulation, and wastewater treatment. In the petroleum industry, it is extensively utilized for desulfurization of natural gas and to accelerate oil–gas separation; it is also employed in equipment for ethylene glycol drying, aromatic hydrocarbon extraction, asphalt processing, and lubricant dewaxing to regulate or suppress foam. In the textile industry, it serves to eliminate foam during dyeing, scouring, and sizing operations; in the chemical industry, it is used to control foaming in resin synthesis, latex production, coating formulations, and ink manufacturing; and in the food industry, it is applied to various concentration, fermentation, and distillation processes. Silicone oil can be applied directly to pot walls, discharge outlets, or metal screens to achieve defoaming. When formulated into a solution, it is suitable for defoaming in oil‑phase systems.
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